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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
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    <title>Document</title>
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<body>
<h1>HTML5页面：我的世界你不懂</h1>
<button onclick="sendMsg()">来个提示!</button>
<script>
    function changeText() {
            document.querySelector('h1').innerText = '我变了!!'
<!--            return Date.now()-->
    }
    function sendMsg () {
            objName.objKey()
    }
</script>
</body>
</html>